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<title>Problem 1606. -- [Usaco2008 Dec]Hay For Sale -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>1606: [Usaco2008 Dec]Hay For Sale</h2><span class=green>Time Limit: </span>5 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>64 MB<br><span class=green>Submit: </span>344&nbsp;&nbsp;<span class=green>Solved: </span>240<br>[<a href='submitpage.php?id=1606'>Submit</a>][<a href='problemstatus.php?id=1606'>Status</a>][<a href='bbs.php?id=1606'>Discuss</a>]</center><h2>Description</h2><div class=content>Farmer John suffered a terrible loss when giant Australian cockroaches
ate the entirety of his hay inventory, leaving him with nothing to
feed the cows. He hitched up his wagon with capacity C (1 <= C <=
50,000) cubic units and sauntered over to Farmer Don's to get some
hay before the cows miss a meal.

Farmer Don had a wide variety of H (1 <= H <= 5,000) hay bales for
sale, each with its own volume (1 <= V_i <= C). Bales of hay, you
know, are somewhat flexible and can be jammed into the oddest of
spaces in a wagon.

FJ carefully evaluates the volumes so that he can figure out the
largest amount of hay he can purchase for his cows.

Given the volume constraint and a list of bales to buy, what is the
greatest volume of hay FJ can purchase?  He can't purchase partial
bales, of course. Each input line (after the first) lists a single
bale FJ can buy.

</div><h2>Input</h2><div class=content>* Line 1: Two space-separated integers: C and H

* Lines 2..H+1: Each line describes the volume of a single bale: V_i

</div><h2>Output</h2><div class=content>* Line 1: A single integer which is the greatest volume of hay FJ can
        purchase given the list of bales for sale and constraints.

</div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>7 3  //总体积为7,用3个物品来背包<br />
2<br />
6<br />
5<br />
<br />
<br />
The wagon holds 7 volumetric units; three bales are offered for sale with<br />
volumes of 2, 6, and 5 units, respectively.<br />
<br />
</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>7  //最大可以背出来的体积<br />
<br />
</span></div><h2>HINT</h2>
			<div class=content><p><br />
Buying the two smaller bales fills the wagon.<br />
</p></div><h2>Source</h2>
			<div class=content><p><a href='problemset.html?search=Silver'>Silver</a></p></div><center>[<a href='submitpage.php?id=1606'>Submit</a>][<a href='problemstatus.php?id=1606'>Status</a>][<a href='bbs.php?id=1606'>Discuss</a>]</center>﻿<br>

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